Noise matters, especially at a campsite or tailgate. That’s why Flex Power inverter generators are engineered to run whisper-quiet, meeting all National Park Service standards for sound. 2200i – Around 49 dB(A) (quieter than the level of a normal conversation). 3300i – Around 52 dB(A) under typical load. 4500ies – Around 54 dB(A) , depending on load, still quieter than open-frame units in this class. 👉 Translation: These models are quiet enough to keep the peace at the campsite, game day, or in the driveway during a power outage. You’ll hear the crowd, or even the chirp of a cricket (100 db(a) over the hum of Flex Power generators!

FlexPower® 6500ies Quiet Inverter Generator

RVMP®

FlexPower® 6500ies Quiet Inverter Generator

Q: What is the continuous runtime on a full tank?

Runtime depends on the load you put on the generator—just like miles per gallon in a truck. Here’s what you can expect under typical conditions: 2200i – 1.1 gallon capacity. Up to 8–10 hours at 25% load , 5–6 hours at 50% load . 3300i – 1.53 gallon capacity. Around 7–9 hours at 25% load , 5–6 hours at 50% load . 4500ies – 2.1 gallon capacity. Roughly 8 hours at 25% load , 6–7 hours at 50% load . 👉 Translation: Enough to keep the tailgate going all game, the RV cozy all night, or the fridge cold through an outage. For longer hauls, our dual-fuel models let you switch to propane for even more runtime flexibility.

Q: What’s up with watts? Starting vs. running watts.

Generators speak their own language when it comes to power, so here’s the breakdown: Starting/Maximum Watts – The quick burst of power your generator provides to kickstart big appliances or tools. Think of it like the “jump” a fridge or A/C needs the second it turns on. This peak ceiling can be hit to provide burst power, but don't push past it. Running Watts – The steady output your generator delivers hour after hour. This is the power you actually live on. K eeping the lights on, fridge cold, and tailgate TV humming. 👉 At Flex Power, we size our units with these numbers in mind, so you don’t have to do guesswork. Plug in, power up, and relax. Whether it’s game day, camp night, or a stormy outage.

$1,299.00

RVMP® The Flex Power® 6500ies is your go-to portable inverter generator for life on the move. With electric start and whisper-quiet operation, it’s built to power your RV, campsite, tailgate, or home backup setup. Without breaking a sweat (or the silence). Equipped with an electric start, this generator combines convenience with powerful performance. Its industry leading silent operation is National Forest Service approved and ensures minimal noise disruption. The telescoping transport handle is used to easily maneuver and transport the generator by using the built in wheels.

Specifications

SafeCO™ technology (our integrated carbon monoxide detection and protection system)
2 Year Warranty
Watts: 6500 (starting), 5500 (running)
Runtime: At 50% load, est. runtime of 10 hrs.
Electric start
Fuel type: Single Gas
Fuel Capacity: 3.6 gallons
Oil Capacity: 0.85 L/0.22 gal
Engine Size: 302cc
Weight: 109 lbs
Dimensions: 23x17x20
Silent: <74 dB @ 23ft
AC 120V Receptacles
AC 30AMP 120V/240V RV Receptacle
AC 120V/240V Twist Lock Receptacle
DC 12V Output
Multiple USB ports
Altitude: at 5,000 ft, output is est. 4,540 watts
Parallel kit ready
Accessory Kit: Remote Key Fob, Engine oil, Oil funnel, Spark plug toolkit, Instruction paperwork

Owner's Manual

Click here to download the owner’s manual for the Flex Power 6500ies (Single Fuel)

Fuel Type: Gas Only

Gas Only Dual (Gas or LP)

Quantity:

RVMP®FlexPower® 6500ies Quiet Inverter Generator

$1,299.00

Built for the Extreme. Trusted by Pros.

FAQ

We get it, power products can feel a little technical. That’s why we keep our answers simple, straight, and useful. No jargon, no shenanigans. Just clear info so you can plug in, power up, and get back to the fun stuff.

What is the continuous runtime on a full tank?

Runtime depends on the load you put on the generator—just like miles per gallon in a truck. Here’s what you can expect under typical conditions:

2200i – 1.1 gallon capacity. Up to 8–10 hours at 25% load, 5–6 hours at 50% load.
3300i – 1.53 gallon capacity. Around 7–9 hours at 25% load, 5–6 hours at 50% load.
4500ies – 2.1 gallon capacity. Roughly 8 hours at 25% load, 6–7 hours at 50% load.

👉 Translation: Enough to keep the tailgate going all game, the RV cozy all night, or the fridge cold through an outage. For longer hauls, our dual-fuel models let you switch to propane for even more runtime flexibility.

How loud is it?

Noise matters, especially at a campsite or tailgate. That’s why Flex Power inverter generators are engineered to run whisper-quiet, meeting all National Park Service standards for sound.

2200i – Around 49 dB(A) (quieter than the level of a normal conversation).
3300i – Around 52 dB(A) under typical load.
4500ies – Around 54 dB(A), depending on load, still quieter than open-frame units in this class.

👉 Translation: These models are quiet enough to keep the peace at the campsite, game day, or in the driveway during a power outage. You’ll hear the crowd, or even the chirp of a cricket (100 db(a) over the hum of Flex Power generators!

What’s up with watts? Starting vs. running watts.

Generators speak their own language when it comes to power, so here’s the breakdown:

Starting/Maximum Watts – The quick burst of power your generator provides to kickstart big appliances or tools. Think of it like the “jump” a fridge or A/C needs the second it turns on. This peak ceiling can be hit to provide burst power, but don't push past it.
Running Watts – The steady output your generator delivers hour after hour. This is the power you actually live on. Keeping the lights on, fridge cold, and tailgate TV humming.

👉 At Flex Power, we size our units with these numbers in mind, so you don’t have to do guesswork. Plug in, power up, and relax. Whether it’s game day, camp night, or a stormy outage.

5 stars: 2 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

I was looking for a quiet 6500 inverter. The fact that the FlexPower is 100lbs was an added bonus for a large unit.

Hi there! We're thrilled to hear you're satisfied with the FlexPower® 6500ies. Thanks for sharing your positive experience!

So far so good just used it for a short time with propane.

Thanks for sharing your experience! We're glad to hear it's working well for you with propane. If you have any questions or need assistance, feel free to reach out!

FlexPower® 6500ies Quiet Inverter Generator

Built for the Extreme. Trusted by Pros.

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